mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 13:30:06 +00:00
49 lines
1.5 KiB
C
49 lines
1.5 KiB
C
/* Software floating-point emulation.
|
|
Return !a
|
|
Copyright (C) 1997-2015 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Richard Henderson (rth@cygnus.com) and
|
|
Jakub Jelinek (jj@ultra.linux.cz).
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include "soft-fp.h"
|
|
#include "quad.h"
|
|
|
|
long double _Q_neg(const long double a)
|
|
{
|
|
union {
|
|
long double ldbl;
|
|
UWtype words[4];
|
|
} c;
|
|
|
|
c.ldbl = a;
|
|
|
|
#if (__BYTE_ORDER == __BIG_ENDIAN)
|
|
c.words[0] ^= (((UWtype)1) << (W_TYPE_SIZE - 1));
|
|
#elif (__BYTE_ORDER == __LITTLE_ENDIAN) && (W_TYPE_SIZE == 64)
|
|
c.words[1] ^= (((UWtype)1) << (W_TYPE_SIZE - 1));
|
|
#elif (__BYTE_ORDER == __LITTLE_ENDIAN) && (W_TYPE_SIZE == 32)
|
|
c.words[3] ^= (((UWtype)1) << (W_TYPE_SIZE - 1));
|
|
#else
|
|
FP_DECL_Q(A); FP_DECL_Q(C);
|
|
|
|
FP_UNPACK_RAW_Q(A, a);
|
|
FP_NEG_Q(C, A);
|
|
FP_PACK_RAW_Q(c.ldbl, C);
|
|
#endif
|
|
return c.ldbl;
|
|
}
|